PROCEDE DE DISMUTATION ET TRANSALKYLATION D'HYDROCARBURES AROMATIQUES EN PRESENCE D'UN CATALYSEUR ZEOLITHIQUE

摘要

The invention concerns an improved process for dismutation and transalkylation of alkylaromatic hydrocarbons in the presence of a catalyst consisting essentially of acid mordenite having a total SiO2/Al2O3 molar ratio from 9 to 80 and a sodium content lower than 1% by weight, said catalyst containing at least one metal selected from group M formed of nickel, palladium and metals from group IB of the periodic classification of elements and containing at least one metal of group IVA of said classification. The catalyst preferably contains from 30 to 99.9 % by weight of mordenite, from 0.005 to 25% by weight of a group M metal, from 0.05 to 10% by weight of a group IVA metal and optionally up to 50% by weight of a binding agent. The invention is particularly useful for dismutation of toluene or transalkylation of toluene and of alkylaromatic hydrocarbons having at least 9 carbon atoms per molecule.